When second screen is connected the session restarts. This no happens when starts the session with the second display connected but if unplug the monitor and plug again after a time (I have no look how much time) the session restarts.
The problem comes from Plasma 5.7.
Same problem here since 1-2 weeks. Tried with 4.8 and 5.7 kernel and still happens.
Session restarting would indicate that your X crashes, does it?
Yes.
It's happening since few days to me, so it may be Plasma 5.8.4 or some kernel, Xorg update. I see that others had problem recently: https://bbs.archlinux.org/viewtopic.php?pid=1670832#p1670832 but I'm not using Nvidia and also with a 4.7 series kernel the problem persists, so may be something else. This other bug appeared at the same time, so they may be related: https://bugs.kde.org/show_bug.cgi?id=373110 System: Manjaro Kernel: 4.8.9 or 4.7.10 Xorg-server: 1.18.4 KScreen: 5.8.4 Graphics: Card: Intel Haswell-ULT Integrated Graphics Controller Display Server: X.Org 1.18.4 driver: intel Resolution: 1920x1080@60.02hz, 1920x1200@59.95hz, 1680x1050@59.95hz GLX Renderer: Mesa DRI Intel Haswell Mobile GLX Version: 3.0 Mesa 13.0.1
Crashes in Xorg need to be fixed in Xorg, nothing we ca do about it, so I'm closing this bug as upstream and would ask you to check with upstream if it's reported and being worked on.